/
data_providers.go
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/
data_providers.go
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// Copyright 2020, OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package testbed
import (
"encoding/binary"
"encoding/hex"
"fmt"
"io"
"log"
"math/rand"
"strconv"
"time"
metricspb "github.com/census-instrumentation/opencensus-proto/gen-go/metrics/v1"
resourcepb "github.com/census-instrumentation/opencensus-proto/gen-go/resource/v1"
tracepb "github.com/census-instrumentation/opencensus-proto/gen-go/trace/v1"
"github.com/golang/protobuf/ptypes/timestamp"
"go.uber.org/atomic"
"go.opentelemetry.io/collector/consumer/pdata"
"go.opentelemetry.io/collector/internal/data"
otlptrace "go.opentelemetry.io/collector/internal/data/opentelemetry-proto-gen/trace/v1"
"go.opentelemetry.io/collector/internal/goldendataset"
"go.opentelemetry.io/collector/translator/internaldata"
)
// DataProvider defines the interface for generators of test data used to drive various end-to-end tests.
type DataProvider interface {
// SetLoadGeneratorCounters supplies pointers to LoadGenerator counters.
// The data provider implementation should increment these as it generates data.
SetLoadGeneratorCounters(batchesGenerated *atomic.Uint64, dataItemsGenerated *atomic.Uint64)
// GenerateTraces returns an internal Traces instance with an OTLP ResourceSpans slice populated with test data.
GenerateTraces() (pdata.Traces, bool)
// GenerateTracesOld returns a slice of OpenCensus Span instances populated with test data.
GenerateTracesOld() ([]*tracepb.Span, bool)
// GenerateMetrics returns an internal MetricData instance with an OTLP ResourceMetrics slice of test data.
GenerateMetrics() (data.MetricData, bool)
// GenerateMetricsOld returns a slice of OpenCensus Metric instances populated with test data.
GenerateMetricsOld() ([]*metricspb.Metric, bool)
// GetGeneratedSpan returns the generated Span matching the provided traceId and spanId or else nil if no match found.
GetGeneratedSpan(traceID []byte, spanID []byte) *otlptrace.Span
}
// PerfTestDataProvider in an implementation of the DataProvider for use in performance tests.
// Tracing IDs are based on the incremented batch and data items counters.
type PerfTestDataProvider struct {
options LoadOptions
batchesGenerated *atomic.Uint64
dataItemsGenerated *atomic.Uint64
}
// NewPerfTestDataProvider creates an instance of PerfTestDataProvider which generates test data based on the sizes
// specified in the supplied LoadOptions.
func NewPerfTestDataProvider(options LoadOptions) *PerfTestDataProvider {
return &PerfTestDataProvider{
options: options,
}
}
func (dp *PerfTestDataProvider) SetLoadGeneratorCounters(batchesGenerated *atomic.Uint64, dataItemsGenerated *atomic.Uint64) {
dp.batchesGenerated = batchesGenerated
dp.dataItemsGenerated = dataItemsGenerated
}
func (dp *PerfTestDataProvider) GenerateTracesOld() ([]*tracepb.Span, bool) {
var spans []*tracepb.Span
traceID := dp.batchesGenerated.Inc()
for i := 0; i < dp.options.ItemsPerBatch; i++ {
startTime := time.Now()
spanID := dp.dataItemsGenerated.Inc()
// Create a span.
span := &tracepb.Span{
TraceId: GenerateSequentialTraceID(traceID),
SpanId: GenerateSequentialSpanID(spanID),
Name: &tracepb.TruncatableString{Value: "load-generator-span"},
Kind: tracepb.Span_CLIENT,
Attributes: &tracepb.Span_Attributes{
AttributeMap: map[string]*tracepb.AttributeValue{
"load_generator.span_seq_num": {
Value: &tracepb.AttributeValue_IntValue{IntValue: int64(spanID)},
},
"load_generator.trace_seq_num": {
Value: &tracepb.AttributeValue_IntValue{IntValue: int64(traceID)},
},
},
},
StartTime: timeToTimestamp(startTime),
EndTime: timeToTimestamp(startTime.Add(time.Duration(time.Millisecond))),
}
// Append attributes.
for k, v := range dp.options.Attributes {
span.Attributes.AttributeMap[k] = &tracepb.AttributeValue{
Value: &tracepb.AttributeValue_StringValue{StringValue: &tracepb.TruncatableString{Value: v}},
}
}
spans = append(spans, span)
}
return spans, false
}
func (dp *PerfTestDataProvider) GenerateTraces() (pdata.Traces, bool) {
traceData := pdata.NewTraces()
traceData.ResourceSpans().Resize(1)
ilss := traceData.ResourceSpans().At(0).InstrumentationLibrarySpans()
ilss.Resize(1)
spans := ilss.At(0).Spans()
spans.Resize(dp.options.ItemsPerBatch)
traceID := dp.batchesGenerated.Inc()
for i := 0; i < dp.options.ItemsPerBatch; i++ {
startTime := time.Now()
endTime := startTime.Add(time.Duration(time.Millisecond))
spanID := dp.dataItemsGenerated.Inc()
span := spans.At(i)
// Create a span.
span.SetTraceID(GenerateSequentialTraceID(traceID))
span.SetSpanID(GenerateSequentialSpanID(spanID))
span.SetName("load-generator-span")
span.SetKind(pdata.SpanKindCLIENT)
attrs := span.Attributes()
attrs.UpsertInt("load_generator.span_seq_num", int64(spanID))
attrs.UpsertInt("load_generator.trace_seq_num", int64(traceID))
// Additional attributes.
for k, v := range dp.options.Attributes {
attrs.UpsertString(k, v)
}
span.SetStartTime(pdata.TimestampUnixNano(uint64(startTime.UnixNano())))
span.SetEndTime(pdata.TimestampUnixNano(uint64(endTime.UnixNano())))
}
return traceData, false
}
func GenerateSequentialTraceID(id uint64) []byte {
var traceID [16]byte
binary.PutUvarint(traceID[:], id)
return traceID[:]
}
func GenerateSequentialSpanID(id uint64) []byte {
var spanID [8]byte
binary.PutUvarint(spanID[:], id)
return spanID[:]
}
func (dp *PerfTestDataProvider) GenerateMetricsOld() ([]*metricspb.Metric, bool) {
resource := &resourcepb.Resource{
Labels: dp.options.Attributes,
}
// Generate 7 data points per metric.
const dataPointsPerMetric = 7
var metrics []*metricspb.Metric
for i := 0; i < dp.options.ItemsPerBatch; i++ {
metric := &metricspb.Metric{
MetricDescriptor: &metricspb.MetricDescriptor{
Name: "load_generator_" + strconv.Itoa(i),
Description: "Load Generator Counter #" + strconv.Itoa(i),
Unit: "",
Type: metricspb.MetricDescriptor_GAUGE_INT64,
LabelKeys: []*metricspb.LabelKey{
{Key: "item_index"},
{Key: "batch_index"},
},
},
Resource: resource,
}
batchIndex := dp.batchesGenerated.Inc()
// Generate data points for the metric. We generate timeseries each containing
// a single data points. This is the most typical payload composition since
// monitoring libraries typically generated one data point at a time.
for j := 0; j < dataPointsPerMetric; j++ {
timeseries := &metricspb.TimeSeries{}
startTime := time.Now()
value := dp.dataItemsGenerated.Inc()
// Create a data point.
point := &metricspb.Point{
Timestamp: timeToTimestamp(startTime),
Value: &metricspb.Point_Int64Value{Int64Value: int64(value)},
}
timeseries.Points = append(timeseries.Points, point)
timeseries.LabelValues = []*metricspb.LabelValue{
{Value: "item_" + strconv.Itoa(j)},
{Value: "batch_" + strconv.Itoa(int(batchIndex))},
}
metric.Timeseries = append(metric.Timeseries, timeseries)
}
metrics = append(metrics, metric)
}
return metrics, false
}
func (dp *PerfTestDataProvider) GenerateMetrics() (data.MetricData, bool) {
// Generate 7 data points per metric.
const dataPointsPerMetric = 7
metricData := data.NewMetricData()
metricData.ResourceMetrics().Resize(1)
metricData.ResourceMetrics().At(0).InstrumentationLibraryMetrics().Resize(1)
if dp.options.Attributes != nil {
attrs := metricData.ResourceMetrics().At(0).Resource().Attributes()
attrs.InitEmptyWithCapacity(len(dp.options.Attributes))
for k, v := range dp.options.Attributes {
attrs.UpsertString(k, v)
}
}
metrics := metricData.ResourceMetrics().At(0).InstrumentationLibraryMetrics().At(0).Metrics()
metrics.Resize(dp.options.ItemsPerBatch)
for i := 0; i < dp.options.ItemsPerBatch; i++ {
metric := metrics.At(i)
metricDescriptor := metric.MetricDescriptor()
metricDescriptor.InitEmpty()
metricDescriptor.SetName("load_generator_" + strconv.Itoa(i))
metricDescriptor.SetDescription("Load Generator Counter #" + strconv.Itoa(i))
metricDescriptor.SetType(pdata.MetricTypeInt64)
batchIndex := dp.batchesGenerated.Inc()
// Generate data points for the metric.
metric.Int64DataPoints().Resize(dataPointsPerMetric)
for j := 0; j < dataPointsPerMetric; j++ {
dataPoint := metric.Int64DataPoints().At(j)
dataPoint.SetStartTime(pdata.TimestampUnixNano(uint64(time.Now().UnixNano())))
value := dp.dataItemsGenerated.Inc()
dataPoint.SetValue(int64(value))
dataPoint.LabelsMap().InitFromMap(map[string]string{
"item_index": "item_" + strconv.Itoa(j),
"batch_index": "batch_" + strconv.Itoa(int(batchIndex)),
})
}
}
return metricData, false
}
func (dp *PerfTestDataProvider) GetGeneratedSpan(traceID []byte, spanID []byte) *otlptrace.Span {
// function not supported for this data provider
return nil
}
// timeToTimestamp converts a time.Time to a timestamp.Timestamp pointer.
func timeToTimestamp(t time.Time) *timestamp.Timestamp {
if t.IsZero() {
return nil
}
nanoTime := t.UnixNano()
return ×tamp.Timestamp{
Seconds: nanoTime / 1e9,
Nanos: int32(nanoTime % 1e9),
}
}
// GoldenDataProvider is an implementation of DataProvider for use in correctness tests.
// Provided data from the "Golden" dataset generated using pairwise combinatorial testing techniques.
type GoldenDataProvider struct {
tracePairsFile string
spanPairsFile string
random io.Reader
batchesGenerated *atomic.Uint64
dataItemsGenerated *atomic.Uint64
resourceSpans []*otlptrace.ResourceSpans
spansIndex int
spansMap map[string]*otlptrace.Span
}
// NewGoldenDataProvider creates a new instance of GoldenDataProvider which generates test data based
// on the pairwise combinations specified in the tracePairsFile and spanPairsFile input variables.
// The supplied randomSeed is used to initialize the random number generator used in generating tracing IDs.
func NewGoldenDataProvider(tracePairsFile string, spanPairsFile string, randomSeed int64) *GoldenDataProvider {
return &GoldenDataProvider{
tracePairsFile: tracePairsFile,
spanPairsFile: spanPairsFile,
random: io.Reader(rand.New(rand.NewSource(randomSeed))),
}
}
func (dp *GoldenDataProvider) SetLoadGeneratorCounters(batchesGenerated *atomic.Uint64, dataItemsGenerated *atomic.Uint64) {
dp.batchesGenerated = batchesGenerated
dp.dataItemsGenerated = dataItemsGenerated
}
func (dp *GoldenDataProvider) GenerateTraces() (pdata.Traces, bool) {
if dp.resourceSpans == nil {
var err error
dp.resourceSpans, err = goldendataset.GenerateResourceSpans(dp.tracePairsFile, dp.spanPairsFile, dp.random)
if err != nil {
log.Printf("cannot generate traces: %s", err)
dp.resourceSpans = make([]*otlptrace.ResourceSpans, 0)
}
}
dp.batchesGenerated.Inc()
if dp.spansIndex >= len(dp.resourceSpans) {
return pdata.TracesFromOtlp(make([]*otlptrace.ResourceSpans, 0)), true
}
resourceSpans := make([]*otlptrace.ResourceSpans, 1)
resourceSpans[0] = dp.resourceSpans[dp.spansIndex]
dp.spansIndex++
spanCount := uint64(0)
for _, libSpans := range resourceSpans[0].InstrumentationLibrarySpans {
spanCount += uint64(len(libSpans.Spans))
}
dp.dataItemsGenerated.Add(spanCount)
return pdata.TracesFromOtlp(resourceSpans), false
}
func (dp *GoldenDataProvider) GenerateTracesOld() ([]*tracepb.Span, bool) {
traces, done := dp.GenerateTraces()
spans := make([]*tracepb.Span, 0, traces.SpanCount())
traceDatas := internaldata.TraceDataToOC(traces)
for _, traceData := range traceDatas {
spans = append(spans, traceData.Spans...)
}
return spans, done
}
func (dp *GoldenDataProvider) GenerateMetrics() (data.MetricData, bool) {
return data.MetricData{}, true
}
func (dp *GoldenDataProvider) GenerateMetricsOld() ([]*metricspb.Metric, bool) {
return make([]*metricspb.Metric, 0), true
}
func (dp *GoldenDataProvider) GetGeneratedSpan(traceID []byte, spanID []byte) *otlptrace.Span {
if dp.spansMap == nil {
dp.spansMap = populateSpansMap(dp.resourceSpans)
}
key := traceIDAndSpanIDToString(traceID, spanID)
return dp.spansMap[key]
}
func populateSpansMap(resourceSpansList []*otlptrace.ResourceSpans) map[string]*otlptrace.Span {
spansMap := make(map[string]*otlptrace.Span)
for _, resourceSpans := range resourceSpansList {
for _, libSpans := range resourceSpans.InstrumentationLibrarySpans {
for _, span := range libSpans.Spans {
key := traceIDAndSpanIDToString(span.TraceId, span.SpanId)
spansMap[key] = span
}
}
}
return spansMap
}
func traceIDAndSpanIDToString(traceID []byte, spanID []byte) string {
return fmt.Sprintf("%s-%s", hex.EncodeToString(traceID), hex.EncodeToString(spanID))
}